I think Finnegan is awesome, but I also really like Maxwell (although I would be deliriously delighted to meet a Maximus)
I'm in the same boat as you! I don't LOVE any boy names. I like Whittaker, Griffin, and Maxwell. And I don't think Finn Ray sounds ridiculous! I also like the other suggestion of Callum nn Cal.
Other ideas with nn possibilities: Jenner nn Jen, Finnegan nn Finn, Sullivan nn Sully, Maverick nn Ricky or Mav, Caledon nn Cal, Everett nn Rhett.
tenleyskye- glad to hear I am not alone :) We already had our girls names picked out and I would have SWORE we were having another girl! My husband LOVES the name Finnegan, but it just sounds like too much to me. He says that Finnegan Ray just sounds like a party lol